Mixing-machine.



E. SPRENGER. MIXING MACHINE. APPLICATION FILED JUNI: so, 1911,

1,057,58@ Patente@ Apr.1,1913.

3 SHEETS-SHEET Z.

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E. SPRENGER., MIXING MACHINE. APPLICATION IVI`LED JUNE 30, 1911.

1,057,589.' Patented Apr. 1, 1913.

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Spcification o 1 C 5;.liav-ef invented-a Certainnew and use-ful. -Imrproilement Mixing-Machines, of 'which' i .tlie., following'is ya -speciiication.-

' The objectief-thisinvention is to provide 1.feiiioiefltand',:easily controlled apparatus for i. iomixinggranular-infiltrer w ith binding agents,

cloringfniatter and 'otherv substances vhich ;maybegllkewise granular, or liquid) y the method-o siting'the primary granular mat* 1ter, so; as to separate granules of difieren-tA 15.15: `-degrees ...of-'ineness, and at' the same. time s 'ub'iectmg it tothey actionof a' stream-or' icstreamsof theadm-ixture; delivered in such .fnannerttliat/.the periods during fwhieh the .glanules -areexposed to the stream vary 20.: acdord1gf to the size of the granules, the" granules, with larger surface areay being eX- yposed to thenstreani :for longer' periods than l thesmaller-granules, so that a uniform-'and 1. thorough--m1x1ng-L effectI is obtained. EX-

yfge-,aaniples-offsubstances which canwith ad# V'vantage.-loedealt -Withffin this manner are I sand; ground zslag; saWLdust, corkand the flik'e; (primary granularsubstances), with -adrniXt-uresv such as cement, lime, gypsum and-ithe.like,"with or'without added color- --ingrmatt/er, the mixtures `loeingior example vused for the manufacture of concrete, artificial'sstonef'cornpositions for use as substivtutes forlzwood etici, in'cOnneCtion with which t11e"qual=ities of .fst-rength,.-durability, uniormity'osettiug. and the like are'- largely dependentgon the thoroughness andf uniormity ofthe mixing process Aand the aceiiiacylwitli 'which the proportions of the iinaterial'to'-thefsiffting apparatus in a==Wet state", im order to securethe highest f qualities vbint ing'gs'tijeiigtllffs foriexamplein malrl:ern nu h invetioxrftofen-l 'are objects Theinvetition is llstrate'dfin'the' accom;-`

Ta'priinary'granularIsubstance with another-granular substance, and

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l appiicafioiild ruhe 30,1911. seriairmeselais.

n'tlie case ilar materials hereto-2^ ngitudinahsection of a' T155 maehine'formi 1g freezers' raient. `Ialt-.entedil-lprf 21",' 91913.,

Figay 2- is a View thereof, seen` from vthe right lhand end'oil Fig. 1. Figs. 3io 6 are Views, on-a larger scale, of a'vgrindingappliance section l oi''fone. 'of l y*che members77 and l Figs. 5 and v6 being resectively side-view, partly in section; andan axial View,` ofthe other 1ne1nber- Figs. 7 and =8are VieWs, on a larger of material to 'the' said grinding appliance, Fig. 7 being an elevation of'` a rotatable valve,vieyved 'from'. the' left hand side of F ig. 1,' and Fig. 8 acrossfsection of the said valve Within itsshel'l.I Fig. 9 is a longitudi vnal section-ofaffmaehine which is exactly similar to thatshown in Figs., l and2, in regard 'to the mixing drum and the eedgand siftingV appliances for' the` `primary granular subst-ance, but'whieh has apparatus for separately injecting several-kinds -of granular Aadmixture; 10- is a view of the-machine shown in Fig. 9, partly` in section, viewed from the'right hand end'. Figs. 11 to 13-are -views ofrneohanism kfor feeding the several kinds of granular-admixtioirey tothe grinding mechanism oifthemaohinef shown i-n Figs. 9 *andi-10,' Fig; 1l being a, section 'of-the containers from' lwhich lthe admixturesare' fed,

.of Fig. 11' andv Fig. 13 a -plan-view of the said containers. i

Referringin thefirst place to Figs. 1,1 and'- 2,' the apparatus illustrated comprises a ro-- coiled and provided"v With: runners (Iig-by means of Whiclr it rests upon ,rollers f? mounted ,iu-bearings el on'va bed-frame i.' The `conical sha-pe ofgthe drum is -noti-iessentiai to thdinyention; afcylindrical drunr or fa. drum: :of polygonal; cross-section' may liead .0, l and; `is open, at -i'he other: iend", Where 'fit fits-:closely around.al.nouwrotatabl-e Mall S.

e -lieaiff-cr-.hasfa 'centraliaperire,

used in theI machine illustrated. Figs. 3 fand 14 being' respectwely an, elevatronfand :aicross-f Fig.=12 fasection perpendicular' to the plane.

e, niterioi scale, yofthe-' mechanism cont-rolling the feedv tary' drumfa'formngi'the mixing chambery,

rei.; nosistijng sienlacefi lungi lfl; yfs'ide-:Joy side, l1 ared ;togivafrd lthe so that the aperturesbe Weemthfeff laterally disposed drivingshaft i and vchain v gear f2, for feeding the primary granular material through -the nozzle into the tubular sifter, so; that .during the 4rotation of the drum the granules fall between the bars of then dropped.

, Close to the wall s, outside the drum, is fixed a container. o, with hinged cover o1, Vfor granular matter to be mixed with the primarygranular mat-ter fed at the other end into the si'fter.' This secondary .granu lar matter, which'I' will call the vadmixture, is fed by a` Worm g1 in the container to a' deliveryorifice controlled by al rotary valve q (Figs. 7 and 8) which works in a shell' 2 formed in the container and can' be fixed by ted projection 3 of thevalve into the -wa'll of the container. The projection. 3 fhas a pointer 4 indicating the position of the valve. In addition to a hole at the bottom,`

livery oriioe'of'the container, the valve has a hole at the to'p, through which the excess of granular material, choked back from the Vdelivery orifice, passes through a hole q1 in theishell ba'ckv to the container 0. Below the delivery orifice of the container there is a grinder p, the purpose of which v 'is lt'o disintegrate such portions of the adiuix'ture as may be too coarse for eihcient 0' mixing'. It will be understood that this grinder is not essential if the admixture is :already in -a uniform, sufiicintly fine lcondition. The grinder comprises aA fixed memf" beriof semicircular outline, with a groove ference, and with several gaps 724 at. its upper'part. The rotary member of the grinder 'is of circular outline, with teeth p2 at its circumference, adapted to work in the groove, '721. Therotary member has apertures p3. The granular admixture falls into the gaps 724 and finds its way through the grinder between the teeth and the walls of the groove yal, being reduced to the requisite degree of fineness bythe action of the teeth. During this grinding act-ion thev material is subjected to a stream of air deliveredby a 'blower r through a pipe r4 into a blow-pipe r1,- which extends into the drum toward the inner end of the tubular .sifterlx AThe air-sweeps through and under the grinder 7), and carries the granular or powdered admixture into the drum. A heating appliance r is provided, enabling the air to be heated in .the-pipe r4; steam or liquldor 'means of a screw'y passing through a slotforI the passage of the admixture to the de? of V-shaped cross-section near its circum-- solid fuel may be used for this purpose, and in the making'of a mixture for the manufacture'of 1Afcementthe setting-,quality of the cement may be to a verv large` extent, regulated by regulating the heating of the admixture;

The stream of air-borne admixture sweeps through the drumyand along the sifter, and acts longest, by direct impact, on those portions of the primary granular which are longest retained in the sifter. Inside the drum the mass tumbled 'about by the mixing appliances al, is still acted o'n by the residual free admixture blown into the d1-um, and

granules 'of dierent. sizes separated bythe mixture are again mixed together.

The shaft l carries loose and fast pulleys m for a driving belt, enabling the machine to be driven by a motor; but the construction ndescribed is also suitable for small,m'anually ,driven machines. The primary granular matter is fed tothe nozzle f from a trough z,

` by means of a bucket conveyer g actuated by the shaft Z1 and worm gear 'la z'. Tt vfeed worm g1 is driven by the shaft Z and a belt and pulley m and the spindle of the grinder 7J, having bearing in a cover g2, is actuated by this worm by'means of gear wheels icl, kt.' The blower '1 is actuated by the shaft Z. by -means of a belt and pulley Z3. The drum itself is rotated by means of a toothed wheel c1 on the shaft, meshing with a rack c2 on the drum.

The primary granular matter in the trough )i maybe moistened'with wat-er from a pipe n and the mixture in the drum vmay be sprayed with water from a.V perforated pipe al. Liquids other than water may be applied in this manner, for examplev color ing'matter in solution, or solutions such as- -are used as admixtui'es in the manufacture of cement.

The blower, grinder and container 0 are Icarried by a frame'u which Ais fixed to the frame by means'of screws v and can be removed from the latter, after unfastening' the screws, in Aorder to end of the drum. l

give access to the open j With some. admixtures it is of advantage to use steaniinstead f air, as a carrier therc` for, m which case the blower 1s disconnected and a steam'pipe is joined to, or inserted y into theffoiv e 'r4 similarl a uma nozzle may be inserted into the said pipe r4 for sup plying admixtures in ay liquid state, inthe form of spray.

Thenapparatus described works with a perstate over the material graded and rolling along-in-s'aid sifting drum. v

5. Amixin machineV comprising a mix-vv ing drum, a sIfter in said drum, means for feedn 'a primary granular material across the-si ing-surface of said sifter, the apertures in said surface increasing in size with the'inerease of distance from the feed end of the sifter, a blower, and a grinder for admixing material, having an aperlt'ured re volving. inding member disposed in the path' of he blast from said blower so that material finely divided for admixing purposes by said grinder is carried by saidgbla'st over said' sifting surface, in a direction lopposed to the direction of'feed ofthe primary granular material.-

ing drum, asifter in said drum, 4means for feeding afprimar'y granularmaterial across the sifting surface of said sifter,v the apertures in said surface increasingin vsize with which material choked back 'from said de? livery passage is forcedby the worm back into said chamber, and a blower disposed so that'the blastk therefrom carries; a stream of Athe admiXture over said siftingvsurface, in a direction opposed to the direction of feed ofl the primary granular material. v lfn witness whereof I *have signed this specication in the presence 'of -two switnesses. 6. A.in1x1ng machInecom-prismg a mlX- Y l EMIL SPRENGER. Witnesses:

RANDALL ATKINSON, .ALBERT PHiLLIrs. 

